Regulations Governing Institutions Engaging In Credit Card Business Article 24

A card issuer should formulate different credit risk levels and assign each cardholder a credit risk level in line with their credit standing, and adopt tiered pricing for the interest rates of revolving credit after taking into account the cost of funding and operating costs, and should periodically review the applicable interest rates to respective cardholders at least on a quarterly basis.A card issuer shall specify in the credit card agreement events that will trigger the adjustment of interest rate applicable to a cardholder and that interest rate will be adjusted only if an agreed event has occurred. At the time of rate adjustment, a card issuer shall notify the cardholder of reason for adjustment, the adjusted interest rate, and other relevant information.A card issuer shall periodically review credit cards it has issued at least once every six months.For credit cardholders who opt for revolving credit facility on a long-term basis, a card issuer shall offer the cardholders options on repayment or interest rate adjustment as required by the Competent Authority.
中文原文 信用卡業務機構管理辦法第24條
發卡機構應按持卡人之信用狀況,訂定不同等級之信用風險,並考量資金成本及營運成本,採取循環信用利率差別定價,且至少每季應定期覆核持卡人所適用利率。
發卡機構應於契約中載明得調整持卡人適用利率之事由,且於符合該約定事由時,始得調整持卡人利率;調整時,並應將調整事由及調整後利率等相關資訊通知持卡人。
發卡機構對已核發之信用卡至少每半年應定期辦理覆審。
發卡機構對長期使用循環信用之持卡人,應依據主管機關規定提供相關還款或利息調整方案,以供持卡人選擇。

English translation for reference only; the Chinese text prevails. Not legal advice.